Bobbin-stripping machine.



D. L. CHANDLER.

BOBBIN STRIPPING MACHINE.

APPLICATION FILED APR. 30. I9l5.

1 1 85,632 Patented J une 6, 1916.

3 SHEETS-SHEET I.

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D. L. CHANDLER.

BOBBlN STRIPPING MACHINE.

APPLICATION FILED APR. 30. I9I5.

Patented June 6, 1916.

3 SHEETS-SHEET 2- THE COLUMBIA PLANOGRAPH co., WASHINGTON. D. c.

D. L. CHANDLER.

BOBBIN STRIPPING MACHINE.

APPLICATION mm APR. 30. 1915.

Patented June 6, 1916.

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UNITED STATES PATENT OFFICE.

DANIEL L. CHANDLER, OF AYER, MASSACH USETTS, ASSIGNOR TO FITCHBURG BOBBIN CLEANING MACHINE 00., OF FITCI-IBURG, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

BOBBIN-STRIPPING MACHINE.

Application filed April 30, 1915.

To all whom it may concern:

Be it known that I, DAxinL L. CHANDLER, a citizen of the United States, residing at Aycr, in the county of Middlesex and State of Massachusetts, have invented a new and useful Bobbimstripping Machine, of which the following is a specification.

This invention relates to a machine for stripping filling from bobbins and the principal objects thereof are to provide a practical and eilicient machine capable of oper ating at high speed; to provide means wherebv if this action is not performed on any bobbin or bobbins such unstripped or partially unstripped bobbins will not be discharged from the machine but will continue in position and go around through one or more successive stripping operations until they are fully clean, and means whereby all bobbins that are fully clean will be automatically discharged: to provide positive and effective means for getting rid of the waste in such a way that it cannot interferewith the operation of the machine; to provide improved mechanism for controlling and actuating the stripping and cleaning jaws so as to cause them to operate in the proper sequence; to provide an improved and simplified means for removing the waste from the stud on which it is left by the cleaning operation. and to provide an improved and simplified means for intermittently turning the carrier wheel.

The invention also involves improvements in details of construction of these and other parts of the machine and combinations of mechanism whereby these several parts are enabled to cooperate effectively with each other.

Reference is to be had to the accompanying drawings in which-- Figure 1 is a plan of a bobbin stripping machine constructed in accordance with this invention; Fig. 2 is a side view of the same; Fig. 3 is a side view of the rear operating eccentric: Fig. 4 is an enlarged side View of certain details showing the parts in a position different from that in Fig. 1: Fig. 5 is a sectional view on the vertical line 55 of Fig. 2. and Fig. 6 is an end elevation of the cleaning jaws showing their supporting studs and the frame in section.

The machine is shown as mounted on a frame 10 and is provided with a shaft 11 receiving power from a pulley 12 and trans- Specification of Letters Patent.

Patented June 6, 1916.

Serial No. 25,045.

mitting it through gears 13 to a main shaft 11. In whatever way this shaft receives power, it has two functions. First. to feed the bobbins, and second, to operate the mechanism for stripping the filling from the bobbins. For accomplishing the first object, this shaft is provided with a bevel gear 15 for driving an inclined shaft 16 which, in a similar manner, drives a horizontal shaft 17, shown as located at the bottom of the frame. ()n this shaft 17 are shown two eccentrics 18 and 19 for each head which the machine has. In the form shown there is a head on each side of the frame and consequently two pairs of eccentrics 18 and ()ne of the eccentrics 18 is provided with a strap 20 which has other functions but which is provided with a link 21 connected with an arm 22 oscillatably mounted on a horizontal transverse shaft This arm is provided with a spring ratchet tooth 2i adapted to engage in notches 25 in the edge of a wheel 26 which constitutes an endlcss bobbin carrier.

It will be obvious that by the rotation of the shaft 16 and the operation of the eccentric 18. the arm 22 will be oscillated and the wheel 26 intermittently rotated one step for each complete rotation of the shaft 17. On the other side of the frame there is a second wheel 26 which rotates alternately and is on an identical shaft and has an independent means for moving it. The other wheel 26 is dialed and operated in exactly the same way by eccentric straps. etc.

Each of the wheels or endless carriers is provided with a series of radial pins or spindles 27 for receiving the bobbins to be stripped. At the base of each of these pins is a spring preferably in the form of a rubber buffer 28. These springs allow the bobbins to be forced up toward the wheel when placed on the pins. but hold them slightly away normally. On account of the intermittent rotation of this wheel it will be obvious that the operator can place bobbins on the pins largely at his own convenience and that he does not have to follow the exact motion of the wheel nor restrict himself to the oscillations of the arm 22 in any way.

The frame is provided with a substantially semi-circular guard 30 adjacent to the pins for receiving the butts of the bobbins as shown at the bottom in Fig. 2 and holding the same in position until the wheel rotates around to the end of this guard.

The method of stripping the waste from the bobbins will be described later, but at the present time the ejecting means will be described. This consists of a hammer 31, one of course for each wheel, mounted on a pivot 32 fixed on the frame and provided with a spring 33 for normally forcing the hannner out to the position shown in Fig. 2. The hammer is provided, however, with a slanting cam face 3t adapted to be engaged by the slanting edges of the teeth which form the notches 25 so as to force the hammer back to the position shown in Fig. 4: every time one of these teeth passes the hammer. Then as the cam face slips off into the notch the hammer is free to swing out. The spring 33 forces it out suddenly so that its face engages the butt of the bobbin and kicks it off the spindle or pin 27. This in itself is an improvementover the machines known in this art because the hand trucks which are used for transporting bobbins around the factory can be placed in position to receive them -directly froln the wheel in this way and all necessity for hand loading of the trucks is eliminated.

It will be noted that the hammer is provided with a spring 35 adapted to engage the rim of the wheel when the hammer swings outwardly so as to yieldingly stop the hammer in its outward position. The hammer is also provided with automatic means for preventing its operation on a bobbin whenever a bobbin reaches ejecting position with waste still on it. In other words, if a bobbin is not properly stripped by the stripping mechanism it will not be ejected from the wheel but will continue to travel around and pass through the stripping mechanism a second time, and in fact continue to do so until it is stripped. This is an important feature because it avoids the necessity of having to pick over the bobbins to take out those that have not been fully stripped. For this purpose the hammer is provided with an arm 36 having a plate 37 thereon provided with a rough surface. This may be of any desired character, as for example, sheet metal bent into a shape like an ordinary curry comb, or a metallic plate perforated and provided with teeth as indicated. This is in position to. brush along the side of a bobbin while in horizontal position and at the stop before it reaches ejecting position but not to engage a naked bobbin. If, however, there is waste on the bobbin, this clearer engages it and moves the bobbin into the dotted line position shown in Fig. 2 when the bobbin next beyond it is being ejected. Then upon the turning of the wheel through the next step, this bobbin will reach the stroke while this bobbin is still at a distance from the spring butter 28. Therefore, the hammer will not touch the bobbin and it will continue on the spindle and drop back into position by gravity when that spindle reaches substantially vertical posi tion so that it will have to pass through the stripping operation again.

The stripping mechanism proper will now be described. The eccentric strap 20 has been referred to and the other eccentric strap 20 is of the same character but without any link 21. Each of these straps is provided with a plunger, as 38 and 38. Each plunger has two pins 39 fixed thereto and operating in slots in the eccentric strap. Loose collars it) on the plungers are ongaged by the pins. Beyond these are springs -l-l and 41 The spring il closes the jaws slightly before the eccentric reaches the bottom of this stroke as well as opening them slightly after the eccentric starts back, thus providing a dwell. This is all there is to the plunger 38 and eccentric strap 20 but in the other case an additional feature is provided. At the bottom of the spring '-t1 is a collar 12 seated in a pair of notches in the eccentric strap. Below this is a stronger spring 41 and the pin and slot are duplicated at the bottom. Thus a strong resistance is provided which, however, will allow the jaws to spread during their workim stroke if they meet with unusual resistance. The pin and slot shown on the other plunger and eccentric strap are mainly for the purpose of making the parts the same and not requiring an additional pattern. These plunger-s 38 and 38 are connected with racks 5t and 50 respectively for operating two sets of jaws which are designed for performing the stripping operation.

On the shaft 1t is a crank arm operating a slide 42 movable in ways on the side of the frame 10. The slide 42 is provided with opposite openings 44 therethrough across which pass two studs 45 and 46. On each of these studs are pivoted arms for use in removing the filling from the bobbin. Two arms t7 are shown, each provided with a steel knife jaw 48. Each of these arms is free to turn on its stud and on them are gear segments 49 and 49, respectively. These two gear segments mesh with each other. One of them. t9,1neshes with the rack teeth 50 on the plunger 38. One of these arms is provided with a stud thereon for limiting the approach of the arms to each other. It will be obvious that this rack can be reciprocated to turn the arm and jaws from the position shown in dotted lines in Fig. 5, in which they are housed within the openings 41 of the slide 42, to the position shown in full lines in the same figure where they approach the bobbin and engage the filling so as to remove it upon being forced along the bobbin. The other two arms 53 are operated by gear segments in the same way, the rack teeth 51 being provided for that purpose on the plunger 38. Each of these arms is provided with a clearer jaw head 57 projecting to one side for receiving the jaws proper preferably as shown in my Patent N 0. 1,145,000 patented July 6, 1915.

Located in alinement with each of the spindles 27, when it reaches stripping position, is a stationary stud for receiving the waste from each spindle as it is drawn off by the jaws. On this is a slide 71 operated by a bell crank 72 pivoted on a stationary bracket 73. On the slide 42 is a cam track 74 for operating this bell crank and slide. The slide recedes as the jaws approach and then follows them forward to permit the deposit of the waste on the stud. and then strip it off and let it drop away. A guide 75 engages the ends of the bobbins to keep them in position.

The operation of the machine is as follows :The rotation of the shaft 11 results, through the operation of the eccentric 18, link 21 and arm 22, in the intermittent rotation of the wheel 26. The operative places bobbins on the spindles 27 largely at his own convenience, as he can easily place two in position when the wheel is stationary if he so desires. Every time the wheel stops, one of the spindles is left in horizontal position on each side of the wheel. On the side toward the main shaft 14 the horizontal bobbin is left in alinement with the stud 70 and the jaws are in position just ready to operate upon it. These jaws, as has been stated, are operated by the eccentrics 18 and 19 and at this time the slide 42 is in the position shown in Fig. 2 at the extreme limit of its stroke. As it starts back, the knife jaws close but the cleaning jaws are kept open for a while, until they have passed beyond the shank of the bobbin. The slide moves back with the knife jaws in contact with the filling and they force off the filling which is usually found at the large end of the bobbin. The spring 41 holds these jaws a certain distance apart so that they do not scrape along the bobbin shank but remove only the large bunch of filling near the base. After the jaws have moved far enough so that the cleaning jaws come opposite the large end of the shank of the bobbin. the eccentric 18 has moved to pull these jaws together and so as substantially to engage the bobbin. If there is too much filling on the bobbin the jaws can yield and pass over it on account of the spring 41".

The operation of the jaws results in pulling the end of the bobbin up against the end of the stud 70 and moving the filling on the stud as the jaws move clear up to the end of it. The lilling is thus left on the stud as the jaws separate and the slide starts back. During this motion of the slide to the left, the bell crank 72 is operated by the slide guide 7-1 to move the slide 71 along the stud and force the filling from it while the bobbin and its spindle are moving around to the next situation.

It will be understood, of course, that although the bobbins are loosely held on the spindles, they are prevented from falling off the same by the track 30 and that when a bobbin has passed around to the front of the machine and is again in horizontal position, it passes the clearer 37. If the bobbin is entirely clean, this clearer has no effect, as it does not actually touch the bobbin, but it is spaced near enough the bobbin so that if any filling is left on the shank, the clearer in its reciprocation will move the bobbin out toward the end of the spindle. \Vhen the bobbin reaches the first inclined position beyond the horizontal position in Fig. 2, the hammer 31. swings out with a quick stroke and kicks it off, if it is in position back against the spring buffer 28, but if it has been slid back from it by the clearer 37, the hammer cannot reach it and consequently it slides back into position on the spindle and goes around again through the whole operation. The wheel is kept from rotating too far and too fast by friction blocks 76.

Although I have illustrated and described a. particular embodiment of the invention, I am aware of the fact that many modifications can be made therein without departing from the scope of the invention as expressed in the claims. Therefore, I do not wish to be limited to the details of construction herein shown and described, but

hat I do claim is 1. In a bobbin stripping machine, the combination of an endless carrier in a vertical plane having spindles thereon for receiving the bobbins and moving them along an endless path, means movable longitudinally with respect to one of said spindles when in one of its positions for taking the waste from a bobbin, means for preventing the bobbins from sliding from said spindles when at the bottom of the carrier, and means for forcibly ejecting the bobbins off the spindles just after they pass beyond the median horizontal position on the carrier.

2. The combination of a rotary carrier on a horizontal axis having radial spindles thereon for receiving bobbins, means for stripping the filling from the bobbins when in horizontal position at one side of the carrier, means for preventing the bobbins from slipping off the spindles when the spindles are carried around beneath the carrier, a spring-pressed arm having means thereon for engaging the butt of a bobbin and disspindles charging it from a spindle after it passes beyond the last named means, said carrier having surfaces thereon for pressing the arm back and releasing it periodically as the carrier moves.

3. The combination of a rotary wheel, having spindles thereon for receiving bobbins, means for stripping the filling from the bobbins when in horizontal position at one side of the carrier, a semi-circular plate for preventing the bobbins from slipping off the spindles when the spindles are carried around beneath the wheel, a spring-pressed arm having means thereon for engaging the butt of a bobbin and knocking it longitudinally from a spindle after it passes beyond the last named means, said carrier having edge teeth thereon provided with cam surfaces for pressing the arm back and releasing it periodically as the carrier moves.

4. The combination of an endless carrier having spindles thereon for receiving bobbins, means for stripping the filling from the bobbins when in horizontal position at one side of the carrier, a spring-pressed arm having means thereon for engaging the butt of a bobbin and removing it from a spindle, said carrier having surfaces thereon for pressing the arm back and releasing it periodically as the carrier moves, and means connected with said arm for removing each. bobbin from the field of action of said arm when the bobbin has filling thereon, whereby an uncleaned bobbin will be retained on the carrier and operated upon a second time by the stripping devices.

5. The combination of an endless -arrier having spindles thereon for receiving bobbins, means for stripping the filling from the bobbins when in horizontal position at one side of the carrier, means for preventing the bobbins from slipping off the spindles when the spindles are carried around beneath the carrier, a spring-pressed arm having means thereon for engaging the butt of a bobbin and knocking it longitudinally from a spindle after it passes beyond the last named means, said carrier having surfaces thereon for pressing the arm back and releasing it periodically as the carrier moves, an arm projecting from the first named arm and movable therewith and having a rough surface adapted to engage filling on a bobbin and move the bobbin along the spindle so that it will be out of reach of the first named arm but will have no effect on a perfectly clean bobbin.

6. The combination of a carrier having thereon for receiving bobbins, means for stripping the filling from the bob bins when in position at one side of the carrier, means for engaging the butt of abobbin and knocking it from a spindle, and an arm having a rough surface adapted to engage filling on a bobbin and move the bobbin along the spindle so that it will be out of reach of the bobbin knocking means but will have no effect on a perfectly clean bobbin.

7. In a bobbin stripping machine, the combination of a rotary carrier having spindles thereon for receiving bobbins, a slide having means thereon for stripping filling from a bobbin while on the carrier, a stud located in position in alinement with a bobbin and spindle when in stripping position whereby the filling will be deposited on said stud from the bobbin, and means for clearing the filling from the stud after the bobbin passes beyond it, said means comprising a slide on the stud, a bell crank connected with said slide for moving it, and a cam on the first named slide for positively operating the bell crank in both directions during its reciprocation.

8. In a bobbin stripping machine, the combination of a rotary wheel having radial spindles thereon for receiving bobbins, a reciprocatory slide having jaws thereon for engaging the filling on a bobbin and removing it therefrom, a main shaft for operating said slide, means for operating said jaws, a link, means for periodic-ally moving the link, an arm pivoted to swing on the axis of said wheel and connected with said link to be oscillated thereby, and a spring pawl on the arm, said wheel having teeth and notches in position to be engaged by said spring pawl as it oscillates to intermittently rotate the wheel.

9. In a bobbin stripping machine, the combination of a rotary wheel having radial spindles thereon for receiving bobbins, a reciprocatory slide having jaws thereon for engaging the filling on a bobbin and removing it therefrom, a main shaft for operating said slide, a second shaft, means for operating the second shaft from the main shaft, an eccentric on the second shaft having a strap, means connected with said eccentric strap for operating said jaws, a link connected with said eccentric strap, an arm pivoted to swing on the axis of said wheel and connected with said link to be oscillated thereby, a spring pawl on the arm, said wheel having teeth and notches in position to be engaged by said spring pawl as it oscillates to intermittently rotate the wheel, and means for positively forcing the bobbins off the spindle periodically comprising a knocker arm having a cam surface in position to be operated by said teeth.

10. In a bobbin stripping machine, the combination of a rotary wheel having spindles radially mounted thereon for receiving bobbins, a reciprocatory slide having jaws thereon for engaging the filling on a bobbin and removing it therefrom while the bobbin is on one of said spindles, means for operating said jaws, an arm pivoted to swing on the aXis of said wheel and oscillated thereby, a spring pawl on the arm, said wheel having teeth and notches in position to be engaged by said spring pawl as it oscillates t0 intermittently rotate the Wheel, and means for positively forcing the bobbins radially off the spindles periodically comprising a knocker arm having a cam surface in position to be operated by said teeth.

11. In a bobbin stripping machine, the combination of an endless conveyer having spindles thereon for receiving bobbins, a slide adapted to reciprocate along one of the bobbins, a shaft for operating said slide, two pairs of jaws carried by said slide for operating on the bobbin, a shaft operated from the first named shaft, two eccentrics on said shaft set at different angles, each having an eccentric strap,imeans connected with one set of jaws for operating it from one eccentric strap, and means connected with the other set of jaws for operating it from the other eccentric strap.

12. In a bobbin stripping machine, the combination of an endless conveyor having spindles thereon for receiving bobbins, a slide adapted to reciprocate along one of the bobbins, a shaft for operating said slide, two pairs of jaws carried by said slide for operating on the bobbin, a shaft operated from the first named shaft, two eccentrics on said shaft set at different angles, each having an eccentric strap, means connected with one set of jaws for operating it from one eccentric strap, and means connected with the other set of jaws for operating it from the other eccentric strap, each of the last two named means comprising a plunger movable longitudinally with respect to said eccentric straps, and a. spring on each eccentric strap for normally holding the plunger in its outermost position but allowing it to yield inwardly.

13. In a bobbin stripping machine, the combination of an endless eonveyer having spindles thereon for receiving bobbins, a slide adapted to reciprocate along one of the bobbins, a shaft for operating said slide, two pairs of jaws carried by said slide for operating on the bobbin, a shaft operated from the first named shaft, two eccentrics on said shaft set at different angles, each having an eccentric strap, means connected with one set of jaws for operating it from one eccentric strap, and means connected with the other set of jaws for operating it from the other eccentric strap, each of the last two named means comprising a plunger movable longitudinally with respect to said eccentric straps, and a spring on each eccentric strap for normally holding the plunger in its outermost position but allowing it to yield inwardly, one of said eccentric straps being provided with a fixed collar against which the end of the spring thereon bears, and a second spring of stronger tension beyond said collar arranged to hold that plunger inwardly toward the eccentric with yielding pressure.

14. In a bobbin stripping machine, the combination of an endless conveyer having spindles thereon for receiving bobbins, a slide adapted to reciprocate along one of the bobbins, a shaft for operating said slide, two pairs of jaws carried by said slide for operating on said bobbin, a shaft operated from the first named shaft, two eccentrics on said shaft set at different angles, each having an eccentric strap, means connected with one set of jaws for operating it from one eccentric strap, and means connected with the other set of jaws for operating it from the other eccentric strap, each of the last two named means comprising a plunger movable longitudinally with respect to said eccentric straps, and a spring on each eccentric strap for normally holding the plunger in its outermost position but allowing it to yield inwardly, one of said eccentric straps being provided with a fixed collar against which the end of the spring thereon bears, and a second spring of stronger tension beyond said collar arranged to hold that plunger inwardly toward the eccentric with yielding pressure, whereby when the jaws controlled by the last named set of springs and eccentric straps is moved to closed position, it will be retained in that position during a comparatively large part of the rotation of the eccentric shaft.

15. In a bobbin stripping machine, the combination with a reciprocable slide, of a rack carried by the slide and transversely reciprocable thereon, a jaw on the slide connected with the rack and operated thereby, means for reciprocating said rack and yielding means for giving the rack a dwell at the end of the stroke.

In testimony whereof I have hereunto set my hand, in the presence of two subscribing witnesses.

DANIEL L. CHANDLER. Witnesses:

J. H. KELLIHER, M. J. Panama. Jr.

copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents, Washington, D. C. 

